We present an effective approach for controlling chaos by using a differential geometric method. It has been shown that the proposed method can control chaotic motion not only to steady state but also any desired periodic orbit. The main characteristic of is algebraically transform nonlinear dynamics into linear one, so techniques be applied. To demonstrate feasibility our method, Lorenz system under different designed requirements illustrated.

A dynamic vibration absorber reduces the influence of a force whose excitation frequency nearly coincides with natural rotating machine. However, performance this type passive can be affected by changes in environment. In paper, we describe voice coil motor (VCM) that serve as actuator an active which regulated for different conditions. With VCM, suitable controllers designed periodic rejection using characteristics notch filter combination root-locus theorem. We have evaluated both...

The enhancement of mechanical properties in martensitic AISI 420 stainless steel is realized through the incorporation TiN ceramic particles using selective laser melting (SLM) method. This study introduces an innovative hybrid mixing method designed to uniformly disperse within matrix, ensuring absence agglomerations and contaminations feedstock for SLM process. Employing a combined approach involving Taguchi method, Grey Relational Analysis, Principle Component optimal processing...

This paper proposes an asynchronous steady-state visual evoked potential (SSVEP)-based hospital bed nursing system without training from the users. The proposed can be easily applied to any kinds of electrical beds and help user control attitude by only staring at flashing panel. Different most brain-computer interface (BCI) systems consisting commercial instruments, this study provides a total design solution. firstly presents light-emitting-diode stimulation panel induce user's SSVEP...

Dross formation in laser cutting of electrical steel sheet different environments, namely oil, alcohol, and air, was predicted optimized using a deep neural network (DNN) an improved grey wolf optimizer (I-GWO), respectively. Analyses random forest method response surface showed that the environment, power, pulse frequency, speed had significant influence on dross formation. In addition, oil leads to less than alcohol air. A stacked autoencoder combined with multi-objective employed generate...

The purpose of this study is to investigate the effects laser spot size on mechanical properties AISI 420 stainless steel, fabricated by selective melting (SLM), process. Tensile specimens were built directly via SLM process, using various diameters, namely 0.1, 0.2, 0.3, and 0.4 mm. corresponding volumetric energy density (EV) 80, 40, 26.7, 20 J/mm3, respectively. Experimental results indicate that an important process parameter has significant surface roughness, hardness, density, tensile...

This study focused on the efficacy of employing a pulsed fiber laser in curved cutting thin, non-oriented electrical steel sheets. Experiments were conducted paraffinic oil by adjusting input process parameters, including power, pulse frequency, speed, and curvature radius. The multiple output quality metrics included kerf width, inner outer heat-affected zones, re-welded portions. Analyses Random Forest Method Response Surface indicated that frequency was most important variable affecting...

A mathematical model is developed to describe the characteristic behavior of an impact print hammer stored energy type. The armature represented by a rigid mass held against backstop preloaded linear spring with negative stiffness which characterizes net effect permanent magnet and prestressed flexible beam acting on armature. Periodic sine pulses are adopted represent currents release strike ribbon paper viscous dashpot. coefficient restitution employed characterize instantaneous rebound at...

Mechanical properties and microstructure are investigated for a martensitic stainless steel (AISI 420) fabricated by selective laser melting (SLM) in three build directions. The tensile specimens built SLM classified into groups. Group A is horizontally the thickness direction, B width C vertically length direction. loading direction test parallel to of C, but perpendicular that Groups B. Experimental results indicate has significant effects on residual stress, hardness, builds....

Design, simulation and experimental implementation of a wavelet basis function network learning controller for linear brushless dc motors (LBDCM) are considered. Stability robustness with position tracking is the primary concern. The proposed deals mainly external disturbances, e.g. nonlinear friction force payload variation in motion control motors. It consists two parts, one state feedback component, other component. designed on simple model, component neural controller. attenuation effect...

A combination of independent component analysis and empirical mode decomposition (ICA-EMD) is proposed in this paper to analyze low signal-to-noise ratio data. The advantages ICA-EMD are these: ICA needs few sensory clues separate the original source from unwanted noise EMD can effectively data into its constituting parts. case studies reported here involve sources contaminated by white Gaussian noise. simulation results show that an effective tool.

Robust output tracking control of a linear brushless DC motor for transportation within manufacturing system is presented. System identification with driver performed by dynamic signal analyser, thus providing linearised model the motor. External disturbances corrupting and modelling uncertainties due to payload variations errors are considered. A scheme guaranteed H∞ performance proposed. It shown that state feedback law achieving desired objective can be obtained solving Riccati matrix...

MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 365:127-136 (2008) - DOI: https://doi.org/10.3354/meps07478 Genetic evidence for different scales of connectivity in a marine mollusc Maxine P. Piggott*, Sam C. Banks, Peter Tung, Luciano B. Beheregaray Molecular Group Research, Department Biological Sciences, Macquarie University, Sydney, New South Wales...